chore(deps-dev): update codeigniter/phpstan-codeigniter requirement from ^1.3 to ^2.0

[dependabot]

Updates the requirements on codeigniter/phpstan-codeigniter to permit the latest version.

Release notes

Sourced from codeigniter/phpstan-codeigniter's releases.

v2.1.0

What's Changed

Added

• Type asObject-fetched entities by the producing model's casts

Full Changelog: CodeIgniter/phpstan-codeigniter@v2.0.1...v2.1.0

Commits

• 61b0339 Type asObject-fetched entities by the producing model's casts
• da84020 Apply the model's casts to entity property types
• 408f5d4 Document the CodeIgniter bootstrap and SQLite-affinity limitation
• aa91ccb Add a 1.x to 2.x upgrading guide
• f236fef Register the cache-handler and services-argument rules and require ext-sqlite3
• 3d8ffb3 Make datetime and json casts nullable on nullable columns
• 39efbcb Discover migrations from all namespaces when none is configured
• 8613271 Document Model/Entity type inference
• c237109 Type fake() as a fabricated record of the model's return type
• eb763b2 Type Model findColumn as a list of the column's values
• Additional commits viewable in compare view

[paulbalandan]

The "always evaluate to true" are legitimate dead code caused by our phpstan extension being smarter. Also, inline @var to some can be removed especially those relating to entities and models so as to enjoy the precise typing.

[michalsn]

Thanks Paul. I will try to fix it.